I think Ken and his attorney made a tactical judgement call, that the best way to get Mae out of hospice included having doctor's testimony. Given that a LaGrange doctor had certified Mae as terminal, they may have felt that rocking the boat too hard would result in a failed mission.
In a purely idealistic form of adversarial proceeding, they would concede nothing.
The statements you listed are hearsay supposedly made by a woman with dementia ...
Emphasis on "supposedly." Who made the allegation of dementia? When was the allegation made?